Lanolin is a type of oil extracted from wool, which is a natural fiber obtained from sheep. It is a yellow-white, waxy substance that is used in a variety of products, such as cosmetics, soaps, and lubricants. Lanolin is also known as wool wax or wool grease, and it is produced by separating the fatty acids from the wool fibers. It is a highly effective moisturizer and emollient, and it is often used to protect and soften skin.